"François Jacob is one of the world's leading scientists, a professor of the Collège de France and the Institut Pasteur, and the winner of the Nobel Prize in Medicine (with André Lwoff and Jacques Monod). He has written an extraordinarily thought-provoking and far-ranging book on evolution which, as he states in his preface, "deals with genes and men, with sex, aging, and molecules. Above all, it deals with the theory of evolution, its status as well as its content. For if the theory of evolution provides a framework without which there is little hope to understand where we come from and why we are as we are, it is important to define the limits beyond which it is used no longer as a scientific theory, but as a myth.""--Back cover.